books
- Light and Matter -- physics for students majoring in the life sciences
- Simple Nature -- physics for scientists and engineers, with a nontraditional order of topics
- Mechanics -- introductory mechanics for scientists and engineers, with a traditional order of topics
- Conceptual Physics
- Fundamentals of Calculus
- Special Relativity
- General Relativity
open-source software
- Planet Finder - an applet that shows the locations of the planets, stars, moon, and sun in the sky from any location and for any date and time
- Spotter - a program that lets students check their answers to math and science questions
- OpenGrade - software for teachers to keep track of grades
- When - an extremely simple personal calendar program, aimed at the Unix geek who wants something minimalistic